Deltoid Tendonitis

Overview Deltoid tendonitis is an injury to the deltoid muscle which covers the shoulder joint. The deltoid muscle is a large muscle which lifts the arm up sideways and can be divided into three parts: the front or the anterior …

Iliocostalis

Overview Iliocostalis is one of the three thin and long muscles of the group called erector spinae (erigere: to erect, spina: spine) which are found parallel with the vertebral column. Erector spinae is the strongest muscle group of the back. …

Medial Pterygoid

Overview Medial pterygoid is a quadrilateral muscle and just like lateral pterygoid, it is also involved in chewing (mastication). It is also called internal pterygoid muscle. However, in contrast to lateral pterygoid, medial pterygoid performs mandibular elevation that results in …

Lateral Pterygoid

Lateral Pterygoid

Overview Lateral pterygoid (also called external pterygoid) is a deep muscle located in the face and is part of the muscle group that has a primary role in chewing (mastication). It is short, flat, thick and somewhat conical in shape. …